Trolley-wheel.



N0. 706,2". Patented Aug. 5, I902.

R, H. APELT.

TRDLLEY WHEEL.

(Application filed. Man-30, 1901. Renewed Dec. 19, 1901) (No Model.)

FIE.E. FIG. 3.

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TROLLEY-=WHEEL.

SPECIFICATION forming part of Letters 'Patent No. 706,21 1, dated August 5, 1902. Application filed March 30, 1901. Renewed December 19, 1901- Serial No. 86.534. (No model.)

To ztZZ whom it may concern:

Be it known that I, RUDOLPH H. APELT, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Trolley-VVheels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to trolley-wheels for use on electric railroads; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a section through the wheel. Fig. 2 is a side view of one flange-plate and the hub. Fig. 3 is a side view of the tread-ring and the other flange plate.

A is a flange plate or disk provided with a hub a, which is bored out to fit the pinupon which the trolley revolves.

B is a second flange plate or disk, which is secured upon the end portion of the hub a. The disk B may be secured in any approved manner which will permitit to be removed when desired, as by making it a close fit on the hub and forcing it onto the hub.

O is a tread-ring, which is interposed between the two disks A and B and which may be taken out and renewed as often as be comes worn by contact with the line-wire.

The ring 0 has a hole considerably larger than the hub a, so that an oil-chamber c is formed around the hub, and the said hub has an oil-hole 0, so that the oil may lubricate the trolley-pin.

with the trolley-pin.

An oil-screw e is provided for admitting oil into the chamber 0.

It is obvious that either flange A or B can also be replaced should it become Worn or broken without having to throw away the Whole trolley-wheel.

What I claim isr 1. In a trolley-wheel, the combinatiomwith a flange-plate provided with a hub having an oil-hole in it, of a second flange-plate slidable on the said hub, one of the said flange-plates being also provided with a series of lateral projections, and a tread-ring provided with grooves which slide over the said projections, an oil-chamber being formed by the two said flange-plates around the said hub and within the tread-ring, substantially as set forth.

2. Inatrolley-wheel, the combination, with a flange-plate provided with a hub, of a flangeplate secured on the said hub and provided with a series of projections, and a tread-ring provided with grooves which engage with the said projections and having also a central opening which forms an oil-chamber between the said flange-plates, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

RUDOLPH l-I. APELT.

Witnesses ALICE J. ll/IURRAY, FREDK. K. DAGGETT. 

